Mechanic&#39;s tool



Dec. 11, 1951 A MCKNIGH-r, JR 2,578,077

MECHANICS TOOL Filed July 11, 1947 A tto rneyx Patented Dec. ll, 195i ,MECHANICS 'rooL Arch C. McKnightjJr., Torrance; Calif.

Application July 11, 1947, Serial No. 760,439

1 Claim.

The present invention relates to a mechanics tool and it consists in the combinations, constructions and arrangements of parts herein described and claimed.

It is an object of the invention to provide a multi-purpose tool having a minimum of parts.

It is a further object of the invention to provide a tool capable of use as a gauge for a variety of purposes.

Another object of the invention is the provision of a tool of the character set forth which may be economically manufactured and which will be simple and eective in its operation.

Other and further objects of the invention will become apparent from a reading of the following specification taken in conjunction with the drawing, in which:

Figure l is a plan View of an embodiment of the invention,. o

Figure 2 is an end view thereof,

Figure 3 is a reduced plan view disclosing one method of using the device,

Figure 4 is a like View to Figure 3 wherein another use of the device is disclosed, and

Figure 5 is a plan view of an element of the invention shown in use as a gauge of the diameter of an article.

Generally, the invention comprises a quadrant having an extended portion at one edge thereof and having a square pivotally mounted at its apex to the quadrant and having a detachably mounted-substantially triangular member which may be mounted upon a common pivot point. The device is capable of a variety of uses as a gauge and measuring device.

Referring more particularly to the drawings, there is shown therein a mechanics` tool comprising a full quadrant l0 having an extended edge II upon one of the straight sides thereof. A bolt I2 is adapted to extend through the side II and is provided with a wing nut I3 0r the like. Pivotally mounted upon the bolt I2 is a square having arms I4 and I5. The arm I4 is provided with a socket I6 adjacent the inner end thereof for the reception of legs I1 and I8 integrally formed upon a hollow triangle I9 which is removably mounted upon the bolt I2.

The triangle I9 is provided with a hollow interior having a pair of straight inner edges and 2 I. It is also provided with a pair of straight outer edges 22 and 23. The arm I5 is provided with indicia 2d along one edge thereof and the socket I5 is provided with indicia 25.

The arc 26 of the quadrant I0 is provided with right reading indicia 21 and left reading indicia 28 adjacent its edge. Indicia 29 is provided along the unextended flat edge of the quadrant adjacent the bolt I2.

The device is capable of a variety of uses. For example, if it is desired to measure an acute angle the arm I4 or A is placed along one side of the angle in question and the edge II alongside the other arm of the angle whereupon the arm i5 or C will indicate the exact measurement of the angle Where it intercepts the indicia 23.

For the measuring of an obtuse angle, the arm A and the edge 30 or edge 2 are placed against the angle to be measured. For a reading is added to the indicia 21 as indicated by the edge 22 of the triangle I9.

To measure the size of a hexagonal or Hex nut, the edge 2 of the triangle I9 is set to register with the arrow 3l whereupon the head of the nut may be placed against the arm A and the edge 2 and a reading may be had from the indicia 29.

To measure the interior diameter of a circular opening the triangle I9 is inserted therein with the edge 22 parallel and in contact with one side thereof and the indicia 33 will give a reading as to the correct diameter thereof.

To measure the diameter of a cylindrical article as, for example, a bolt, the bolt 35 may be inserted within the opening in the triangle I9 whereupon the indicia 34 may be read at the point of contact for the exact measurement of the diameter of the bolt.

Again, to measure the length of the shank of a bolt, that is to say, excluding the head thereof, the arm I5 may be inserted beneath the head of the bolt and a correct reading may be had from the indicia 24 on the arm I5. It will be apparent that, by removing the triangle i9 from the bolt I2 that the quadrant and the arms A and C may be used in many ways for the measurement of angles and that with the triangle i9 inserted into the socket i6 that the device may be utilized for a great many additional purposes.

While but one form of the invention has been shown and described herein, it will be readily apparent to those skilled in the art that many minor modifications may be made without departing from the spirit of the invention or the scope of the appended claim.

What is claimed is:

A geometrical instrument comprising a quadrant shaped base having graduations thereon, an integrally formed extended portion for one of 3 the radial sides of said base, a pin extending through said extended portion, a square pivotally mounted upon said pin, said pin being at the center of the arcuate side of said base, a portion of said square being cooperative with the graduations on said base, a socket aiixed to one leg of said square adjacent said pin, and an open frame-like triangle, a yoke member formed integraliy with and extending from said triangle and adapted to encompass said pin and be relo REFERENCES CITED The following references are of record in the 1 ie of this patent:

UNITED STATES PATENTS Number Number Name Date Halley Jan. 20, 1880 Meek Aug. 20, 1899 Winnett Dec. 12, 1899 McCormick Jan. 17, 1911 Lightle May 12, 1914 Olmsted Nov. 27, 1917 Davis July 28, 1936 FOREIGN PATENTS Country Date Great Britain Jan. 20, 1880 France May 11, 1912 

